单项选择题
A.橡胶B.胶水C.焊接D.螺栓
A.2/10B.2/100C.2/1000D.2/10000
A.米尺B.注水透明塑料管C.卡尺D.手拉葫芦
A.立柱B.轿厢底C.轿厢顶D.导靴
微信扫一扫,加关注免费搜题